准噶尔盆地不整合类型与油气运聚关系研究

RESEARCH ON THE RELATION OF UNCONFORMITY TYPE WITH OIL AND GAS MIGRATION- ACCUMULATION AT ZHUENGAER BASIN

针对准噶尔盆地不整合实际资料,根据不整合面上、下地层的超-削关系,提出了一种新的不整合类型划分方案。这种方案将不整合划分为四种类型:上超／削蚀型、整一／削蚀型、上超／整一型、整一／整一型。并且通过对不整合类型与油气运聚关系研究认为:上超／削蚀型,不整合面上、下对油气聚集最有利;整一／削蚀型,不整合面之上有利于油气的运移,不整合面之下有利于油气的聚集;上超／整一型,不整合面之上有利于油气的聚集,不整合面之下有利于油气的运移;整一／整一型,不整合面上、下对油气运移有利,只有在断层与褶皱的配合下,才有利于油气的聚集。

According to the actual unconformity data of Zhuengaer Basin and the relation of lap-erosion on the upper or lower part of unconformity layer, a new kind of unconformity type demarcation project has been put forward. This kind of project has divided the line unconformity as four kinds of types:onlap/erosion truncation type, concordance/erosion truncation type, onlap/concordance type, concordance/concordance type. On the basis of research on the relation of unconformity type with oil - gas migration- accumulation, the upper or lower part of onlap/erosion truncation type are best of all favorableness for accumulation of oil and gas; the upper part of concordance/erosion truncation type are favorableness for migration of oil and gas, the lower part are favorableness for accumulation of oil and gas; the upper part of onlap/concordance type are favorableness for accumulation of oil and gas, the lower part are favorableness for migration of oil and gas; the upper or lower part of concordance/concordance type are favorableness for migration of oil and gas,and favorableness for accumulation of oil and gas if the match of fault and fold.